An aqueous solution of sodium phosphate is a 0.142 M Na3PO4(aq) has a density of 1.02 g/ml What is the percent by mass of sodium phosphate ?

What is the mole fraction of sodium phosphate

The mass has escaped into a gas which you can not see so the law stays true.

Idon't see the pic?

Qand k are only the same when the forward rate of the reaction has reached zero.

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.